Canie, you can't get blood from a turnip. If the PDE catalog you used starts in 1973
and you are looking for events in 1965, 1969 and 1971 don't be too surprised if you
don't find any. Our catalog for the region, however starts in 1700. I have attached
below the events of Mb>=4.0 within 500 km of the test site for your amusement.
Taking the background rate from the 20-year interval between 1-1-1975 and
12-31-1994, an interval which contains several strong events in the region with
aftershock sequences, there are recorded 3244 events of Mb>=4 in that 500
km radius in these 7304 days. This is a background rate of 0.44 events per day.
During the three 30-day periods following the tests (i.e. 10-20-65 to 11-28-65;
10-2-69 to 11-1-69; and 11-6-71 to 12-6-71) we find 82 events in these categories.
This is a daily rate of 0.87 events per day, approximately double that in the
20- year background period when no tests were conducted.
In view of our discussion on this board, I thought it might also be interesting
to see what the rate during the 30-days prior to the 3 tests was. A total of
119 events were recorded in this 90-day period for a rate of 1.32 events per day,
more than 3 times the background rate.
It is also interesting to note that there were some strong earthquakes nearby
the test locale which occurred in the succeeding month. For example a Mb 6.0
and Mb 5.8 occurred in the Andreanoff Islands about 50-100 km west of the
test on November 22 and 23, 1965; similar Mb 6.0 events at nearly the same
Andreanoff Isl. epicenter occurred on October 21, 1969 and a Mb 6.3 on
October 31, 1969, in both cases a large earthquake occurred about 3 weeks
after the test in the same epicenter to the west of the test.
To the east of the test in the Near Islands region, there were also two large
succeeding earthquakes. In 1969 it was a Mb 5.5 occurring 16 days after the
test and in 1971 it was a Mb 6.0 also at Near Island and also occurring 16 days
after the test. The distance in these cases is about 300 km from the test site. Note
that in 1965, an earthquake of Mb 5.2 also occurred at the Near Islands, but with
a time difference after the test of 13 instead of 16 days.
Is the difference in rate significant, and what about the very high rate
prior to the tests which were planned for years beforehand? Can Roger suggest
a way to resolve this question?

Here is the data - same format as above.
10 29 21 0 0 1965 51.438 179.182 1 6.1 180
11 4 10 18 42 1965 52.000 175.700 64 4.1 15
11 4 10 18 43 1965 52.500 175.300 64 4.0 27
11 6 22 30 19 1965 51.460 176.620 23 5.1 43
11 7 22 36 17 1965 51.500 -177.700 49 4.4 13
11 8 12 41 10 1965 51.600 -177.000 64 4.3 10
11 9 11 38 14 1965 51.730 174.340 30 4.8 77
11 10 3 58 28 1965 51.200 -178.800 33 4.1 11
11 10 15 42 55 1965 51.400 178.700 40 4.6 11
11 11 2 21 8 1965 51.420 173.980 45 5.2 65
11 12 1 1 25 1965 52.090 173.980 33 4.8 32
11 15 7 13 3 1965 51.900 -173.700 33 4.3 13
11 17 16 41 43 1965 52.300 172.200 22 4.6 25
11 19 6 19 43 1965 51.200 178.500 45 4.4 7
11 19 15 11 43 1965 50.110 177.700 18 5.3 67
11 22 14 0 29 1965 51.940 -176.080 63 5.6 87
11 22 20 25 31 1965 51.320 -179.670 41 6.0 204
11 22 20 39 53 1965 51.470 -179.620 40 5.0 70
11 23 2 17 50 1965 51.410 -179.670 45 5.8 156
11 23 6 16 29 1965 51.400 -179.600 45 4.2 7
11 24 13 41 28 1965 52.000 -174.300 33 4.1 7
11 24 14 37 12 1965 51.700 -174.280 36 5.1 21
11 25 12 28 3 1965 51.780 -174.350 41 4.5 34
11 26 1 26 34 1965 51.790 -174.370 37 4.4 37
11 29 1 24 46 1965 51.600 -175.400 47 4.3 13

10 2 22 6 0 1969 51.417 179.182 1 6.5 159
10 4 8 3 25 1969 51.197 178.663 29 4.0 14
10 6 16 20 57 1969 51.170 -179.020 38 4.0 0
10 6 18 49 38 1969 51.990 178.280 136 4.0 0
10 7 22 12 39 1969 51.215 -179.637 45 4.9 43
10 8 10 8 7 1969 51.060 178.560 38 4.1 0
10 9 3 54 27 1969 51.580 178.900 71 4.3 0
10 11 22 53 28 1969 52.100 -173.900 0 4.1 2
10 18 8 43 58 1969 52.520 173.420 9 5.5 237
10 19 9 5 13 1969 51.306 -178.533 41 4.8 37
10 21 8 34 19 1969 51.440 178.750 46 4.0 0
10 21 20 53 48 1969 51.306 -179.235 48 6.0 0
10 22 13 18 31 1969 51.270 -179.310 46 4.2 0
10 24 14 25 8 1969 51.239 -179.182 43 4.2 17
10 25 15 54 50 1969 51.383 -177.706 47 4.5 17
10 26 9 7 49 1969 51.621 -177.908 41 4.1 15
10 26 18 9 18 1969 52.030 -179.857 163 4.5 16
10 26 18 49 48 1969 50.600 173.900 0 4.0 4
10 28 5 29 2 1969 51.318 -176.833 45 4.5 20
10 28 22 36 52 1969 51.370 178.610 50 4.3 0
10 31 11 33 2 1969 51.260 -178.950 22 6.3 319
10 31 11 47 32 1969 51.207 -178.987 48 5.0 21
10 31 12 33 24 1969 51.139 -179.052 47 4.5 18

11 6 22 0 0 1971 51.472 179.107 2 7.4 315
11 7 10 1 44 1971 51.240 -178.500 50 4.2 0
11 8 8 31 32 1971 50.982 -179.342 14 4.0 0
11 8 11 54 12 1971 51.472 179.107 2 4.9 39
11 10 12 10 52 1971 51.740 -179.497 2 4.5 0
11 12 19 36 54 1971 51.759 175.955 71 4.3 25
11 15 9 32 2 1971 51.656 -176.135 55 5.2 77
11 21 21 10 55 1971 51.402 -176.328 47 4.3 21
11 22 0 46 11 1971 52.331 174.225 38 6.0 274
11 23 10 2 1 1971 51.851 -176.191 68 4.8 34
11 24 22 36 35 1971 51.660 -177.110 56 4.0 0
11 25 10 12 48 1971 51.042 -177.944 22 4.2 11
11 25 17 10 44 1971 51.722 178.662 91 4.5 0
11 28 0 46 11 1971 50.770 179.440 8 4.6 0
11 29 11 14 13 1971 51.721 173.328 41 4.2 22
11 29 11 14 20 1971 52.259 174.151 51 4.3 20
11 30 6 43 56 1971 51.111 179.539 44 5.0 67
11 30 6 47 23 1971 50.890 179.430 25 4.3 0
11 30 7 16 53 1971 50.809 179.450 15 4.4 0
11 30 7 49 10 1971 51.023 179.497 39 4.4 28
11 30 10 7 14 1971 50.900 179.440 32 4.0 0
11 30 14 17 58 1971 50.862 179.391 35 4.1 18
11 30 14 33 33 1971 51.009 178.838 19 4.3 0
11 30 14 58 55 1971 51.015 179.538 43 4.1 21
11 30 16 24 57 1971 52.160 179.610 159 4.7 0
11 30 22 18 50 1971 50.843 179.400 15 4.5 0
12 1 13 31 46 1971 50.937 179.582 19 4.0 0
12 1 15 3 6 1971 50.898 179.554 20 4.0 0
12 1 15 14 2 1971 50.840 179.501 39 4.3 0
12 1 19 50 2 1971 50.878 179.575 17 4.2 0
12 3 7 27 26 1971 51.628 -177.179 63 4.8 27
12 3 16 6 13 1971 51.736 178.724 85 4.7 17